161949-57-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 161949-57-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,1,9,4 and 9 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 161949-57:
(8*1)+(7*6)+(6*1)+(5*9)+(4*4)+(3*9)+(2*5)+(1*7)=161
161 % 10 = 1
So 161949-57-1 is a valid CAS Registry Number.